A correction: The PSR2100 has about 20 new styles. These styles do incorporate many of the new voices. The big, big problem is that the old styles - the 160 styles that are from the PSR2000 have the same old voices. I agree with the rest of everyone's gripe about Yamaha.
Does anyone else, by the way, have a problem with how Yamaha has switched the position of the sequencer buttons and the style selection buttons on the PSR3000? I do. On the PSR2100, PSR2000, and PSR740, the style buttons have always been the closest to the keyboard and the sequencer farther away. This is the way it should be. Now with the PSR3000, you have to reach farther away to call up the next style. Definitely a bad design.
Beakybird